70 lines
1.3 KiB
C
70 lines
1.3 KiB
C
/**
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* @file param.c SIP Parameter decode
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*
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* Copyright (C) 2010 Creytiv.com
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*/
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#include <re_types.h>
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#include <re_fmt.h>
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#include <re_msg.h>
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/**
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* Check if a parameter exists
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*
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* @param pl Pointer-length string
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* @param name Parameter name
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* @param val Returned parameter value
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*
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* @return 0 for success, otherwise errorcode
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*/
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int msg_param_exists(const struct pl *pl, const char *name, struct pl *val)
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{
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struct pl v1, v2;
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char xpr[128];
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if (!pl || !name || !val)
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return EINVAL;
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(void)re_snprintf(xpr, sizeof(xpr), ";[ \t\r\n]*%s[ \t\r\n;=]*", name);
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if (re_regex(pl->p, pl->l, xpr, &v1, &v2))
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return ENOENT;
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if (!v2.l && v2.p < pl->p + pl->l)
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return ENOENT;
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val->p = v1.p - 1;
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val->l = v2.p - val->p;
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return 0;
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}
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/**
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* Decode a Parameter
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*
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* @param pl Pointer-length string
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* @param name Parameter name
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* @param val Returned parameter value
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*
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* @return 0 for success, otherwise errorcode
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*/
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int msg_param_decode(const struct pl *pl, const char *name, struct pl *val)
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{
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char expr[128];
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struct pl v;
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if (!pl || !name || !val)
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return EINVAL;
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(void)re_snprintf(expr, sizeof(expr),
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";[ \t\r\n]*%s[ \t\r\n]*=[ \t\r\n]*[~ \t\r\n;]+",
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name);
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if (re_regex(pl->p, pl->l, expr, NULL, NULL, NULL, &v))
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return ENOENT;
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*val = v;
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return 0;
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}
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